Talk:Esther Hicks

Just a question upon release datas
In the last entry for Books "Getting into the vortex" it says: "Release date November 15, 2010. Published by Hay House, 2009." What is the difference between releasing and publishing a book? Why can this happen in different years? This way it was published in 2009, but was available almost a year later, in November 2010. Or is this just a mistake? Thanks.